package com.zy.security.oauth2.utils;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.zy.security.core.token.UsernamePasswordAuthenticationToken;

public class JsonUtils {

    // 定义jackson对象
    private static final ObjectMapper MAPPER = new ObjectMapper();

    /**
     * 将对象转换成json字符串。
     * <p>Title: pojoToJson</p>
     * <p>Description: </p>
     *
     * @param data
     * @return
     */
    public static String objectToJson(Object data) {
        try {
            String string = MAPPER.writeValueAsString(data);
            return string;
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 将json结果集转化为对象
     *
     * @param jsonData json数据
     * @param clazz    对象中的object类型
     * @return
     */
    public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {
        try {
            T t = MAPPER.readValue(jsonData, beanType);
            return t;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 将json数据转换成pojo对象list
     * <p>Title: jsonToList</p>
     * <p>Description: </p>
     *
     * @param <T>
     * @param jsonData
     * @param beanType
     * @return
     */
    public static <T> List<T> jsonToList(String jsonData, Class<T> beanType) {
        JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);
        try {
            List<T> list = MAPPER.readValue(jsonData, javaType);
            return list;
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }
    public static void main(String[] args) {
		UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken("zs", "123456");
		Map<String,Object> map = new HashMap<>();
		map.put("asd", "a");
		map.put("zxc", 2.3f);
		map.put("qwe", 1l);
		String objectToJson = JsonUtils.objectToJson(token);
		String mapToJson = JsonUtils.objectToJson(map);
		System.out.println(objectToJson);
		System.out.println(mapToJson);
		System.out.println(new RandomValueStringGenerator(30).generate());
		System.out.println(UUID.randomUUID().toString());
	}
}
